Tenoning-ivjachine



(No Model.) 4 3 Sheets-Sheet l.

E. TOTMAN.

TBNONING MACHINE. y No. 395,526. Patented Jan. l, 1889.

M PETERS Puma-umgnphy. wmngmn, p. a

(No Model.) l u 1 3 Sheets-Sheef 2. E. TOTMAN.

TENONING MACHINE. No. 395.526.- l Patented Jan. 1, '1889.

M Hm l l Egellqonmv.

" Ww@ f Nv PETERS Pholjihogmphn, Waihinginn. D. C.

(No Model.) 3 Sheets-Sheet 3.

E. TOTMAN.

TENONING MACHINE. No. 395,526. Patented Jem. 1,1889.

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llnrrnn @rares Barnett Genion.

EDSELL TOTMAN, OF LA GRANGE, LLINOS.

TENONINGIVIACHINE.

SIECIFICATION forming part of Letters Patent No. 395,526, dated Januaryl, 188g.

Application filed April 2l, 1888. Serial No. 271,426. (No model.)

Be it known that l, EDSELL TOTMAN, of La Grange, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Tenoning -Machines; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which forni a part of this specication. Y

This invention relates to an improved dovetailing or tenonin machineadapted for cutting dovetailed or other tenons upon both ends of a pieceot" wood at the same time.

The invention consists ot' the matters hereinafter described, andpointed out in the appended claims.

In the accompanying drawings, Figure l is a plan view of a machineembodying my invention. Fig. 2 is a iront elevation of the same. Fig. 2%is a side elevation of the same. Fig. il. is a side view of one of thecutters removed from the machine. Fig. 5 is a view of that face of thecutter opposite to that shown in Fig. -i, showing also the saw attachedto the cutter.

As illustrated in said drawings, the main part of t-he machine-frameconsists of two parallel frame plates, A A, connected with each other attheir lower parts by girts a a. At the upper margins ot said plates,near the ends of the latter, are attached two cross -girts, A A', andbetween said girts are located two flat horizontally-arranged bars, A2A?.

B B are two L.- shaped trame-arms or goose necks, which are attached tothe horizontal frame-bars A? A2 at one side of the frame, and overhangthe main part oi.' the traine, in the manner clearly shown in Fig. t. iv

C is a cutter-mandrel mounted horizontally in bearings C (.f upon thetwerhanging ends of the frame -arn'is B B, and lf) is a cutter mandrelmounted in bearings D D', secured to the fraine-bars A2 A?. The mandrelC is provided with a belt pulley, C?, and with toothed cutting-disks EE, preferably located outside ol the bearings C tl. The lower mandrel,l), is provided with a ll elt-pu'lley, D2, and is provided near its endswith cuttingdisks F F, against the outer faces of which are secured sawsG G. The cutting-dis is E E and F F are arranged to operate upon oppo-lsite ends of pieces or strips of wood, so as to forindovetailed or othertenons thereon, the

cutting-tceth of the disks being shaped according to the kind of work tobe done. The said cutting-disks are separated vertically a distancesufficient to form a tenen of desired thickness when the work is carriedhorizon- 6o tally between them, and in order to enable the thickness 'ofthe tenon made by the cutters to be varied as desired, the lmandrels Cand D are made adjustable as to their distance apart vertically. Forthis purpose, in the machine shown, the bearings 'C C of the uppermandrel, C, are made vertically adj ust-able upon the trame-arms B B bymeans as follows: Each of said arms B B is provided at its free oroverhanging end with a iiat ver- 7o tical surface, b, against which issecured an Lshaped plate, B', having vertically-adjustable attachment tothe arm by means of a bolt, b', which passes through the plate andthrough a vertical slot in the vertical part of the arm.` The bearings Care bolted to the horizontal part b of the plate B.

For convenience in adjusting the plate B vertically, said plate isprovided near its upper end witha lug, b2, through which passes 8o avertical adjusting screw, B2, which is mounted to rotate in a horizontallug, h3, at the upper end of the surface b.

The cutting-disks E E are not mounted directly above or over thecutting-disks F F, but somewhat to one side of the latter, thisconstruction being employed to prevent conh tact oi' the saws G G (whichare secured against the outer faces ot' the euttinga'lisks F F) Vwiththe said cutting-disks E E. 9o

Vll is a horizontally-reciprocating work-holding carriagev which issupported in such position and is so moved as to carry the strips orpieces to be operated upon past or between. the cutting-disks, thecarriage being adapted to receive and move a long piece or strip tromwhich shorter pieces are to be cut, so that pieces of a desired lengthmaybe severed by the saws G G at the same time that the tenons ordovetails are being AFormed upon roo the ends of the pieces.

The carriage H consists, as herein shown,

of two side bars, Il l-I, cross-bars h h connecting them and iiat strips7L 7L', which to rm the work-supporting surface of the carriage. Thecarriage is sustained upon the machin efralne by means of two gnidebars, I I, which are attached tothe girts A A ot' the frame, and areprovided in their upper surfaces with guide-grooves eng'aged byprojecting' tongues or ridges upon the side bars, ll ll, of thecarriage.

Means for adj ustin the vertical position of the carriage are providedas follows: rlhe guide-bars l I, attached to the girts A A by means otvertical slotted lugs 1' upon the guide-bars, and bolts 11' fi passing'through said lugs and tl'irough the girts A A. To afford means foraccurately adj usting the position ot' the guide-bars and carriage,setscrews I l are inserted through the tlanges 1 ol' the frame-plates inposition to bear u p-4 wardly against the said guide-bars, as clearlyshown in the drawings.

The lower mandrel in the machine illustrated is not made verticallyadjustable, the distance between the cutting disks being' changed solelyby shitting the position of the upper mandrel. The work-carriage is madevertically movable, described, in order to enable the same to beadjusted to correspond with the thickness of the stutt' bein g operatedupon, and also to bring' the work `into the proper vertical positionwith relation to the cutting-disks at'ter the latter have been separatedor brought together by the adjustment ot' the upper mandrel in themanner above stated.

The carriage H is given a horizontal reciprocatory motion during theoperation ot' the l machine by means ot' a crank-disk, J, and pitman J.Upon the said carriage, at t-he rear of the cutting-disks, is located anabutment strip or ledge, K, against which the work is placed and bywhich the same is carried ferward toward the said cutting-disks in theoperation ot" the machine. The said abutment strip or ledge is hereinshown as secured to the supporting-strips 7L 7i ot' the carriage, whichlatter are arranged at right angles to the cutter-mandrels and near thecuttingdisks, so as to sustain the work at points close to said disks.

K is an end stop located upon the carriage outside of and adjacent tothe saw G at one end of the machine for accurately determining theposition of the end of the blank-strip with relation to thecutting-disks, as said blank-strip is fed endwise to the machine vby theattendant. Said stop K is herein shown as secured to one'oi the strips71?, hereinbefore referred to.

L L are two spring-arms attached to the frame-arms B B and extenc'lingforward over the work-carriage in position to press downwardly againstthe work as the latter 'passes the cutting-disks, thereby holding thework tlat upon the carriage at such time and pressing or dragging itbackwardly against the ledge K, so that it will always be brought to thecutting-disks in a position at right angles tothe said disks. Said armsare herein shown as ad j ustably secured to the frame-arms B l by meansof flat plates pivoted t-o the vert cal side :Faces ot' said trame-armsand provided with concentric slots through which pass clamp-nuts t'orholding the springs at a desired angle.

To prevent the wooden strips carried torward tothe cutting-disks frombeing drawn backwardly in the return movement of the carriage, l pivotpawls M M to tl'ie-frame-arms 'Il l with their free ends in a positionto engage the rear edges oi' said strips at the torward limit of themovement of the carriage, as clearly shown in Fig. Il.

- As an improved construction in cuttingdisks adapted torformingdovetailed tenons, l make the cutting-edges ot the teeth ot saiddisks inclined in such manner that, the end ot' the cutting-edge whichis ad jacent to the outer or thicker end of the tenon is in. advance(having reference to the direction ot motion ot' the teeth in cut-ting)of the opposite end of the cutting-edge which acts upon the inner andthinner part ot' the tenon, as clearly shown in Figs. 4 and '3y thisconstruction each cutting-edge operates with a draw cut, and cuts fromthe outer or thicker part of the tenon inwardly, thereby greatlylessening the lialjiility of breaking or splitting the wood at the outerangles ot the tenon.

rlhe cutting-edges, beveled or inclined in the manner described, areshown in the drawings, Figs. 4 and 5, as formed by means of oblique orbeveled surfaces f f at the forward or advance faces of the teeth, andother beveled surfaces, ff, at the rearsurfaces ot' the teeth.

In the operation of the machine, made as above set forth, the long stripfrom which relatively short pieces, tenoned at both ends, are to be cutis fed endwise over the table from one side of the machine, the operatorthrusting the strip along the top of the table, when the latter is atthe rearward part of its movement, until the end of the strip strikesthe stationary stop K. vances, carrying the entire strip endwise withit, until the strip has been carried a sui'licient distance to insurethe severing of the strip by the saw. In such advance movement o thestrip the tenon will not usually be finished; but the strip will remainin the position shown in Fig. 3 until the end of the strip is againplaced in front of the ledge in the succeeding rearward movement of thecarriage and the latter has advanced with the new strip, when the stripalready severed will be thrust forward past the, cutting-disks by theaction of the strip behind it. The saws G G at both ends of the mandrelobviously serve to cut the end-s of the tenons accurately with relationto the shoulders and side faces thereof, so that all the tenoned piecesproduced will be of exactly the same shape and dimensions.

The carriage then ad,

TOO

IOS

The construction above set forth, wherein the upper cutting-disks aresupported upon overhanging frame-arms or goose-necks, and in which areciprocating carriage is employed to carry the work from a point at theinner or rear ends of the goose-necks outwardly or forwardly to thecutting-disks, has the important advantage of enabling the long strip tobe fed to the machine and to be carried with the carriage in itsmovement toward the cutting-disk, so that short pieces are severed fromthe blankstrip at the same time the tenons are made and short pieces aredischarged freely at the it'ront ot' the machine. Only a single handlingof the lumber is thus required to cut the pieces to a desired length andto form the tenons thereon. the upper cutting-disks might be mounted ina frame having overhead support, or otherwise arranged to avoidinterference with the lateral movement et the long strip or blank as thclatternim'es with the carriage. l-y the construction set it'orth,embracing overhanging frame-arms, however, l am enabled to make themachine with a single trame ot' compact and rigid form, to providerigid. supports tor the cutting-disks, enabling' the latter to beaccurately adjusted and held in position, and at the same time to soarrange the parts that long strips maybe coi'iveniently -ted to themachine and the finished pieces easily discharged theret'rom.

l claim as my inventionl. A tenening-machine comprising ainachine-lrame, two parallel inandrels mounted therein, a revolvingcutting-disk mounted upon each end ot' each ot said mandrels, sawsattached to both ends ot one of said mandrels outside themi,tt.iiig=disks, drive-pulleys upon the mandrels, and a reciprocatingcarriage provided with a ledge to sustain and carry t'orward t-he workbetween said cutting-disks, whereby dovetailed tenons are formed, uponboth ends ot' a piece or strip and the same is It will of course beunderstood that riage located and moving beneath the said overhangingarms, said carriage being provided with a ledge arranged to support andcarry forward the work between the opposite pairs ot cuttingdisks,substantially described. A

A tenoningmachine comprising a machine-frame, two pairs of revolvingcuttingdisks, a reciprocating carriage and pawls pivoted upon themachine-iframe and located in position to engage at their t'ree endswith the work at the forward limit ot the movement olf the carriage tolnevent the work being drawn backwardly with the carria substantially asdescribed.

l. A machine t'or making dovetailial tenons, comprisin a reciprocatingcarri age provided with a ledge to sustain and carry Aforward the workand two pairs ot revolving cutting-disks 'for cutting the dovetails,each of said cuttingdisks havin aseries ot' oblique cutting-edgesarranged with those parts oit the edges which act upon the outer orthicker parts of the tenons in advance, referring to the direction ofmotion ot' the cutters, otl those parts of said edges which act upon the'inner or thinner parts ot the said tenons, substantially as described.

In testimony that l claim the foregoing as in y invention l attix mysignature in presence of two witnesses.

EDSELL T'llMAN. lVitnesses:

C. CLARENCE PooLn, O. N. WILLIs.

